Harness stop motion attachment for looms



March 29, 1949. J. R. svANcAREK 21,465,615

HARNESS STOP MOTION ATTACHMENT FOR LOOMS Filed May 28, 1946 {o} '0) fr 4n Il Il l I ll fl ll Il I l Il Il u l l1l u ll Il Il I 0125- f2 Il lo,//0 40 53 S .l

3, U 'd 'i m U m Q @m39 Patented Mar. 29, 1949 HARNESS STOP MOTIONATTACHMENT FOR LOOMS John R. Svancarek, Homewood, Ill.

Application May 28, 1946, Serial No. 672,730

7 Claims.

This invention relates to improvements in looms, and more particularlyto a harness stop motion attachment therefor.

An object of the invention is to provide an improved harness stop motionattachment for looms which will automatically stop the loom in case of aheddle-strap break.

Another object of the invention is to provide an improved harness stopmotion attachment for looms which will not only sto-p the loom fromoperation should a heddle-strap break, but will also close a switchmechanism for operating an audible or visual signal so that the loomoperator will immediately know when a heddle-strap l breaks therebypermitting the heddle frame to fall on the contact bar of the attachmentto stop the loom and to close the circuit to an audible or visual signalwhich will indicate to the loom operator that there is trouble.

Another object of the invention is to provide :M

improved means for completing the electrical circuit in the event ofdisarrangement or dropping of one or both ends of the harness frame, ashappens when the straps for actuating the same become stretched orbroken, so that the loom will automatically stop,

A further object of the invention is to provide improved attachments forlooms, one of which will be mounted in each end or" a group of harnessframes to be engaged by a heddle frame should the heddle-strap break, tostop the motion of the loom and to close the circuit to an audiblesignal to notify the loom operator that there has been a breakage.

Other objects will appear as the description proceeds.

In the accompanying drawings which form a part of this application,

Figure l is a side elevation of a loom frame showing a heddle framesupported therein and a pair of the improved. harness stop motionattachments in position below said heddle frame;

Figure 2 is a side elevation of o-ne of the improved stop motionattachment devices showing the resiliently supported Contact bar and thespaced switch mechanism for connection with the audible signal, and

Figure 3 isa sectional View taken on the line 3-3 of Figure 2.

Like characters of reference are used throughout the followingspecication and the accompanying drawings to designate correspondingparts.

In carrying out the invention, there is pro- 'vided an improved loomframe having two spaced uprights I and 2 having a cross bar 3 and a headbar 4.

VThe heddle frame 5 is shown supported by the two straps or cords B and1 passing over the pulleys 8 and 9 supported upon the head bar 4.

Disposed under each end of the heddle frame 5 is a stand having a basemember lil and vertically extending frame members il and l2, which areslotted adjacent their upper ends and adjustably support the upper framemembers i3 and i4. The frame members i3 and iii are connected togetherby means of the spaced transversely extending bars or rails I5 and i6,and support the bolts i1 and i8 extending through said frame members i3and i@ and through the slots i9 and 2Q formed in the lower frame membersli and l2, whereby the upper frame members may be adjusted to a positionimmediately below the said heddle frame 5.

inwardly directed angle irons 2l and 22 are secured to the insidesurfaces of the upper frame members i3 and Mby means of the bolts '23and 24, and said angle members adjustably support the contact heads 25and 255 formed on the upper ends of the screws 21 and 2S which arethreaded through the horizontally extending portions oi` the anglemembers 2i and 22, and are held in the desired adjusted position bymeans of the nuts 28 and 3Q disposed above and below each of said anglemembers 2i and 22.

The contact bar 3i is provided with a metal strip 2:2 extending alongits undersurface for Cooperation with the contact heads 25 and 25. Abracket 33 will be secured to the lower surface 0;? the metal plate 32and will be provided with a transverse pivot shaft 3d upon which the eyeof the Contact bar supporting rod 35 is mounted. The rod 35 extendsthrough an aperture in the upper cross frame member i5 and a spring 36is positioned about said rod 35 to resiliently support said Contact bar.A second bracket 3l is secured to the undersurface of a metal plate onthe contact bar 3i and is provided with the bearing pin 38 whichsupports the eye at the upper end of the guide rod 39, which likewiseextends through an aperture in the cross frame member l5 so that theContact bar will be held in proper alignment underneath the series ofheddle frames. An electric Wire til will be secured between the metalangle brackets 2i and 2i. to electrically connect the same, and anelectric wire il and the wire l2 attached to the metal strip 32 on thecontact bar 3l will be connected with a batte-ry 43 and a bell i4 or redsignal lamp, whereby should one of the heddle-straps or ropes 6 and 'ifor each heddle frame break or in the event that a warp end is broken orunduly slack, the heddle frame will be dropped on the contact bar 3l,thereby forcing the same downwardly to engage the base contact heads 25and 25, thereby closing the circuit to the battery i3 and lili whichwill cause the electric bell 44 or red signal lamp to operate thuswarning the loom operator that there has been a breakage. If desired,these attachments located at either end of the heddle frames and belowthe same may be arranged to stop the operation of the loom when a heddleframe is released below its proper level,

From the foregoing description, it will be apparent that there has beenprovided a highly efficient construction of harness stop motionattachment for looms, which will be positive in action and relativelyinexpensive to manufacture and produce.

While the preferred embodiment of the instant invention has beenillustrated and described, it will be understood that it is not intendedto limit the scope of the invention thereto, as many minor changes indetail of construction may be resorted to without departure from thespirit of the invention.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent of the United States is:

1. In combination with a loom having a harness frame, an electric stopmotion comprising a stand disposed below the frame, extension membersadjustably supported by the stand, contact members secured to saidextension members, transverse rails connected to saidfextension members,means for supporting a contact bar on said rails, an electric circuithaving one end connected to the contact bar and the opposite end securedto the contact members, means installed in said circuit for emitting asignal when the circuit is closed by the engagement of the contact barwith the Contact members.

2. In combination with a loom having a harness frame, an electric stopmotion comprising a lstand disposed below the frame, extension membersadjustably supported by the stand, contact members secured to saidextension members, transverse rails connected to said extension members,means for supporting a contact bar on said rails, an electric circuithaving one end connected to the contact bar and the opposite end securedto the contact members, means installed in said circuit for emitting asignal when the circuit is closed by the engagement of the contact barwith the contact members, said contact bar supporting means including apair of depending shafts inserted in apertures formed in the transverserails, and connected to said contact bar, means for selectivelyretaining the bar out of engagement with the contact member.

3. In combination with a loom having a harness frame, an electric stopmotion comprising a stand disposed below the frame, extension membersadjustably supported by the stand, contact members secured to saidextension members, transverse rails connected to said extension members,means for supporting a contact bar on said rails, an electric circuithaving one end connected to the contact bar and the opposite end securedto the contact members, means installed in said circuit for emitting asignal when the circuit is closed by the engagement of the contact barwith the contact members, said contact bar supporting means including apair of depending shafts inserted in apertures formed in the transverserails, and connected to said contact bar, means for selectivelyretaining the bar out of engagement with the contact member, saidlast-mentioned means including a spring received around one of theshafts above the transverse rails.

4. In combination with a loom having a harness frame, an electric stopmotion comprising a stand disposed below the frame, extension menibersadjustably supported by the stand, contact members secured to saidextension members, transverse rails connected to said extension members,means for supporting a contact bar on said rails, an electric circuithaving one end connected to the contact bar and the opposite end Securedto the contact members, means installed in said circuit for emitting asignal when the circuit is closed by the engagement of the contact barwith the contact members, said contact members comprising inwardlydirected angle irons secured to theV inside surface of the extensionmember adjacent the upper end thereof, adjustable screws supported bythe angle irons.

5. In combination with a loom having a har'- ness frame, an electricstop motion comprising a stand disposed below the frame, extensionmembers adjustably supported by the stand, contact members secured tosaid extension members, transverse rails connected to said extensionmembers, means for supporting a contact bar on said rails, an electriccircuit having one end connected to the contact bar and the opposite endsecured to the contact members, means installed in said circuit foremitting a signal when the circuit is closed by the engagement of thecontact bar with the contact members, said signalling means including abell.

6. In combination with a loom having a harness frame, anelectric stopmotion comprising a stand disposed below the frame, extension membersadjustably supported by the stand, contact members secured to saidextension members, transverse rails connected to said extension members,means for supporting a contact bar on said rails, an electric circuithaving one end connected to the contact bar and the opposite end securedto the contact members, means installed in said circuit for emitting asignal when the circuit is closed by the engagement of the contact barwith the contact members, said signalling means including a light.

7. In combination with a loom having a harness frame, an electric stopmotion comprising a stand disposed below the frame, at each end of theframe, extension members adjustably supported by said stands, contactmembers secured to said extension members adjacent the upper endthereof, transverse rails connected to said extension members, a pair ofshafts vertically supported in said rails, a contact bar supported bysaid shafts, resilient means to retain said bar spaced above theextension members, an electric circuit having one end connected to thecontact bar and the opposite end secured to the contact members, meansinstalled in said circuit for emitting a signal when the circuit isclosed by the engagement of the contact members by the contact bar.

JOHN R. SVANCAREK.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name vDate 822,585 Corbishley et al. June5, 1906 1,434,274 Wharton et al Oct. 31, 1922 1,802,855 Whitehead Apr.28, 1931 2,097,859 Holt Nov. 2, 1937

